Welcome chilanga! My parents are from Puebla and i was born in the bronx. That's messed up your bro said that to you. I see that same tendency of some people-some who benefitted from the 1986 IRCA Laws for example, turn their backs to their family members because of their status. I'd say dont take it personal-tell him he's a pinche culero (f*ing a**hoe)...and one day maybe he will wake up and realize the wrong that he has been doing.
As for comments about translation:
While we must be sensitive that some of us dont speak certain foreign languages, we shouldnt jump to conclusions that we have all assimilated to an only english lexicon.
Language, of whichever kind, helps express our most deepest feeling and is a reflection of our culture. We should honor our own cultures and that of others.